brintnall



2 Shets-Sheei 1.

(No Model.) 7

T. M. BRINTNALL.

I BOLT WORK FOR SAFES. No. 315,232. Patented Apr. 7, 1885.

INVENTOR I F I WITNESSES W ELWWSW BY M ATTORNEYS;

(No Model.)

7 2 Sheets-Sheet 2. T. M. BRINTNALL.

BOLT WORK FOR SAFES. No. 315,232. PatentedApr. 7, 1885.

WITNESSES IN'VBNTOR JWWWM BY ATTORNEYS.

UNITED STATES PATENT OFFICE. I

THOMAS M. BRINTNALIJ, OF MARYVILLE, AssIoiroR To. HIMSELF, AND GEORGE R. MANN AND NATHAN P; OGDEN, or s1. .rosnrmmrssounr.

BOLT-WORK FOR SA FES.

UPECIFICTATIQN forming part of Letters Patent No. 315,232, dated April 7, 1885.

Application filed November 24, 1884. (No model.)

'To all whom, it may concern.-

Be it known that LTHoMAs M. BRINTNALL, a citizen of the United States, residing at Maryville, in the county of Nodaway and State of- Missouri, have invented a new and useful Improvement in Bolt-VVork for Safes, of which the following is a description.

This invention relates to that class of devices which retract the bolts of a safe-door when set into action by clock-work. Its object is to extend the bolts of a safe-door by the act of closing the door, so as to securely lock the same,and to retract the bolts so as to unlock the door when set free to act by time mechanism, whereby the door may be both locked and unlocked without any means of communication with its look after the door is closed.

. and Fig. 2 is a central horizontal section of the same. Fig. 3 is a detail view of the triplatches in aninverted position relative to Fig. 1. Fig. 4 is a vertical sect-ion of a portion of a safe-door, showing in elevationa single bolt, an eccentric, and partof the arm thereof as one modification of my invention.

A represents the door of a safe, provided with interior ribs, B, through which two sys terns of bolts, 0 and D, pass in sliding out of and into the edges of the door, to engage and disengage the door-jamb' in looking and unlocking the door. The bolts 0 are connected together by means of a bar, 0, thereby forming one system of bolts acting as a unit. The bolts D are connected together by a bar, D, forming another similar system.

E represents an eccentric mounted on a shaft, E, which is journaled in the lock-frame, and it engages a slot, F, in a bar, G, attached to the system of bolts 0, whereby a half-rotation of the eccentric will extend the bolts, as shown in dotted lines, and a full rotation of I be actuated therewith. I

the bolts. The bar G is here shown as attached to the system of bolts by means of the bar 0, which is secured directlyto the bolts 0. The slot F is just wide enough in the direction of the bolts motion to admit the eccentric E, so that the whole throw of the eccentric is communicated to the bolt; but the slot F is open at its ends, or it is long enough to permit the eccentric to play freely without affecting the bar G or the bolt transversely. H is a spring around-"the shaftpof theeccentric actuating it to revolve in the direction of the arrow.

Y I is an arm attached to the eccentric,wherewith to revolve it by hand to wind up the spring H in setting the lock. J is a springlatch in the path of the arm, to'retain it full set with the bolts retracted. This latch is arranged to strike the door-jamb or some adjunct thereof at the instant of closing the the eccentric will first extendand then retract door, and be tripped thereby to release the said bolt or in some immediate adjunct thereof. The cross-bar C and the transverselyslotted bar G are mere connections between the eccentric E and bolts 0. The system of bolts D may be connected with the system C In case there were but one I by a reversing-lever such as that described in my other specification beforereferred to, to

In order that the safe may be closed during l the usual business hours without danger of being locked accidentally, I provide a latch, 1?, instead of a fixed lug on the inner-face of the door-jamb, to engage the latch J, and I arrange the latch P to be moved out of the path of latch J in any suitable manner, such as by pivoting it to be swung over, as shown in dotted lines. When the latch ,1 is thus turned out of the path of latch J, the door may be closed and opened like any other door, as the locking device will not be affected thereby. Of course, any cam which will produce practically the same result may be substituted for the eccentric E. One advantage of this eccentric is its power to operate a heavy system of bolts. It permits the driving-spring to move through a long distance in moving the bolts but a short distance.

WVhat I claim as my invention, and desire to secure by Letters Patent, is-

1. The combination of a door-bolt having a transverse slot,an eccentric engaging said slot and mounted on a shaft which is j ournaled inthe lock-frame, a spring attached to the eccentric to revolve it, a radial arm attached to the eccentric, and two latches pivoted to the lock frame in the circular path of the said arm at opposite sides of the circle, substantially as shown and described.

2. The combination of a bolt having a trans verse slot fitted to slide in a lock-frame, an eccentric journaled in the lock-frame and engaging said slot, devices for stopping the revolution of the eccentric atopposite points in its circle of revolution, and a spring to revolve the eccentric, substantially vas shown.

to engage each other or not, as may be desired. 0

THOMAS M. BRINTNALL. Witnesses:

W. X. STEVENS, SoLoN G. KEMo-N. 

